PROBLEM TO BE SOLVED: To provide a cut adjusting device of a long crop which can accurately cut long crops having various shapes in a short cut processing time.SOLUTION: A cut adjusting device includes: a detection part 7 which detects a length of a workpiece W from a reference position B determined by a predetermined outer diameter dimension of the workpiece W (a long crop) and a plurality of outer diameter dimensions of the workpiece W in different predetermined positions a control part which determines a cut position of the workpiece W on the basis of a detection result of the detection part 7 and previously stored statistical data and a cutting part 9 which cuts the workpiece W in the cut position.COPYRIGHT: (C)2014,JPO&INPIT【課題】形状が多様な長尺農作物を短い切断処理時間で正確に切断し得る長尺農作物の切断調整装置を提供する。【解決手段】ワークW(長尺農作物)の所定外径寸法により定まる基準位置BからのワークWの長さと、異なる所定位置におけるワークWの複数の外径寸法と、を検出する検出部7と、該検出部7の検出結果と予め格納されている統計データとに基づいてワークWの切断位置を判断する制御部と、該切断位置においてワークWを切断する切断部9と、を備える。【選択図】図3